Effects of supplementation of amylase and compound enzymes on performance and nutrients utilization for laying breeder hens | 添加淀粉酶与复合酶对蛋种鸡生产性能及养分利用率的影响

صينى. 研究玉米-豆粕型日粮中单独或联合添加淀粉酶与复合酶对蛋种鸡生产性能及养分利用率的影响。选用健康的22周龄海兰父母代蛋种鸡1 200只，随机分为4组，每组4个重复，每重复75只鸡，分别饲喂基础日粮、基础日粮+0.15 kg/t淀粉酶、基础日粮+0.20 kg/t复合酶、基础日粮+0.15 kg/t淀粉酶+0.20 kg/t复合酶，试验期为40 d，测定各组鸡只的生产性能及养分利用率。单独或与复合酶联合添加淀粉酶均能显著改善蛋种鸡的产蛋率与料蛋比（P0.05）；单独添加淀粉酶能显著提高蛋种鸡对饲料中淀粉、干物质、有机物、能量的利用率与日粮代谢能（P0.05）；单独添加复合酶能显著提高蛋种鸡对饲料中P、粗蛋白、总氨基酸及部分氨基酸的利用率（P0.05）；与单独添加相比，两者联合添加有进一步提高养分利用率的趋势，但效果并不明显（P0.05）。日粮中添加淀粉酶可显著改善蛋种鸡的生产性能及淀粉和能量利用率；添加复合酶可显著改善蛋白质与部分氨基酸的利用率；与单独添加相比，淀粉酶和复合酶联合使用时，蛋鸡生产性能和养分利用率并未得到明显改善。

إنجليزي. The experiment was conducted to investigate the effects of supplementation with amylase and compound enzymes individually or in combination on growth performances and nutrients utilization rate for laying breeder hens with fed corn soybean meal based diet corn-soybean meal dietary. 1 200 (22-week-old) Hyline parent-breeding layers were randomly allocated to 4 groups with 4 replicates of 75 birds. The dietary treatments were corn-soybean meal control diets, control diet+0.15 kg/t amylase, control diet+0.20 kg/t compound enzymes, control diet+0.15 kg/t amylase+0.20 kg/t compound enzymes. The experiment lasted for 40 d, which included 7 d of preliminary trial and 33 d of test trial. The production performances and nutrients digestibility were tested. The results demonstrated that: (1) Supplementing amylase individually or compound enzymes in combination all significantly improved laying rate and feed conversion rate (P0.05) compared with control diet. (2) Supplementing amylase individually significantly increased the utilization rate of starch, DM, OM, energy and AME for laying breeder hens (P0.05). Supplementation of compound enzymes individually significantly increased the utilization rate of P, CP, TAA, and part of amino acids (P0.05). Compared with adding individual, combination of the two applications had the trend to increase the nutrients utilization rate (P0.05). Supplementation of amylase to diet increased production performance and utilization rate of energy and starch for laying breeder hens.Supplementation of compound enzymes to diet improved utilization of protein and part of amino acids. There was no significant difference in production performance and nutrition utilization between individual and combined supplementation of amylase and compound enzymes to diet for laying breeder hens.